wp_oembed_add_discovery_links() │ WP 4.4.0

Adds oEmbed discovery links in the head element of the website.

Hooks from the function

Return

null. Nothing (null).

Usage

wp_oembed_add_discovery_links();

Changelog

Since 4.4.0 Introduced.

wp_oembed_add_discovery_links() code WP 6.6.2

wp-includes/embed.php 
function wp_oembed_add_discovery_links() {
	$output = '';

	if ( is_singular() ) {
		$output .= '<link rel="alternate" title="' . _x( 'oEmbed (JSON)', 'oEmbed resource link name' ) . '" type="application/json+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink() ) ) . '" />' . "\n";

		if ( class_exists( 'SimpleXMLElement' ) ) {
			$output .= '<link rel="alternate" title="' . _x( 'oEmbed (XML)', 'oEmbed resource link name' ) . '" type="text/xml+oembed" href="' . esc_url( get_oembed_endpoint_url( get_permalink(), 'xml' ) ) . '" />' . "\n";
		}
	}

	/**
	 * Filters the oEmbed discovery links HTML.
	 *
	 * @since 4.4.0
	 *
	 * @param string $output HTML of the discovery links.
	 */
	echo apply_filters( 'oembed_discovery_links', $output );
}